feat: 1. replace black with ruff for fomatting and sort import (#489)

2. use tavily from`langchain-tavily` rather than the older one from `langchain-community`

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

Makefile

@@ -4,11 +4,10 @@ install-dev:
 	uv pip install -e ".[dev]" && uv pip install -e ".[test]"
 
 format:
-	uv run black --preview .
+	uv run ruff format --config pyproject.toml .
 
 lint:
-	uv run black --check .
-	uv run ruff check .
+	uv run ruff check --fix --select I --config pyproject.toml .
 
 serve:
 	uv run server.py --reload

pyproject.toml

@@ -34,6 +34,7 @@ dependencies = [
     "langchain-mcp-adapters>=0.0.9",
     "langchain-deepseek>=0.1.3",
     "wikipedia>=1.4.0",
+    "langchain-tavily<0.3",
     "langgraph-checkpoint-mongodb>=0.1.4",
     "langgraph-checkpoint-postgres==2.0.21",
 ]
@@ -41,7 +42,6 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "ruff",
-    "black>=24.2.0",
     "langgraph-cli[inmem]>=0.2.10",
 ]
 test = [
@@ -68,12 +68,13 @@ fail_under = 25
 [tool.hatch.build.targets.wheel]
 packages = ["src"]
 
-[tool.black]
+[tool.ruff]
 line-length = 88
-target-version = ["py312"]
-include = '\.pyi?$'
-extend-exclude = '''
-# A regex preceded with ^/ will apply only to files and directories
-# in the root of the project.
-^/build/
-'''
+indent-width = 4
+target-version = "py312"
+extend-include = ["*.pyi"]
+
+[tool.ruff.format]
+indent-style = "space"
+line-ending = "auto"
+exclude = ['^/build/']

server.py

@@ -10,6 +10,7 @@ import argparse
 import logging
 import signal
 import sys
+
 import uvicorn
 
 # Configure logging

src/agents/agents.py

@@ -3,9 +3,9 @@
 
 from langgraph.prebuilt import create_react_agent
 
-from src.prompts import apply_prompt_template
-from src.llms.llm import get_llm_by_type
 from src.config.agents import AGENT_LLM_MAP
+from src.llms.llm import get_llm_by_type
+from src.prompts import apply_prompt_template
 
 
 # Create agents using configured LLM types

src/config/__init__.py

@@ -1,12 +1,12 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from .loader import load_yaml_config
-from .tools import SELECTED_SEARCH_ENGINE, SearchEngine
-from .questions import BUILT_IN_QUESTIONS, BUILT_IN_QUESTIONS_ZH_CN
-
 from dotenv import load_dotenv
 
+from .loader import load_yaml_config
+from .questions import BUILT_IN_QUESTIONS, BUILT_IN_QUESTIONS_ZH_CN
+from .tools import SELECTED_SEARCH_ENGINE, SearchEngine
+
 # Load environment variables
 load_dotenv()
 

src/config/configuration.py

@@ -8,8 +8,8 @@ from typing import Any, Optional
 
 from langchain_core.runnables import RunnableConfig
 
-from src.rag.retriever import Resource
 from src.config.report_style import ReportStyle
+from src.rag.retriever import Resource
 
 logger = logging.getLogger(__name__)
 

src/config/loader.py

@@ -2,8 +2,9 @@
 # SPDX-License-Identifier: MIT
 
 import os
+from typing import Any, Dict
+
 import yaml
-from typing import Dict, Any
 
 
 def replace_env_vars(value: str) -> str:

src/config/tools.py

@@ -1,8 +1,9 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import os
 import enum
+import os
+
 from dotenv import load_dotenv
 
 load_dotenv()

src/graph/__init__.py

@@ -1,7 +1,7 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from .builder import build_graph_with_memory, build_graph
+from .builder import build_graph, build_graph_with_memory
 
 __all__ = [
     "build_graph_with_memory",

src/graph/builder.py

@@ -1,21 +1,22 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from langgraph.graph import StateGraph, START, END
 from langgraph.checkpoint.memory import MemorySaver
+from langgraph.graph import END, START, StateGraph
+
 from src.prompts.planner_model import StepType
 
-from .types import State
 from .nodes import (
+    background_investigation_node,
+    coder_node,
     coordinator_node,
+    human_feedback_node,
     planner_node,
     reporter_node,
     research_team_node,
     researcher_node,
-    coder_node,
-    human_feedback_node,
-    background_investigation_node,
 )
+from .types import State
 
 
 def continue_to_running_research_team(state: State):

src/graph/nodes.py

@@ -9,27 +9,26 @@ from typing import Annotated, Literal
 from langchain_core.messages import AIMessage, HumanMessage
 from langchain_core.runnables import RunnableConfig
 from langchain_core.tools import tool
-from langgraph.types import Command, interrupt
 from langchain_mcp_adapters.client import MultiServerMCPClient
+from langgraph.types import Command, interrupt
 
 from src.agents import create_agent
-from src.tools.search import LoggedTavilySearch
-from src.tools import (
-    crawl_tool,
-    get_web_search_tool,
-    get_retriever_tool,
-    python_repl_tool,
-)
-
 from src.config.agents import AGENT_LLM_MAP
 from src.config.configuration import Configuration
 from src.llms.llm import get_llm_by_type
 from src.prompts.planner_model import Plan
 from src.prompts.template import apply_prompt_template
+from src.tools import (
+    crawl_tool,
+    get_retriever_tool,
+    get_web_search_tool,
+    python_repl_tool,
+)
+from src.tools.search import LoggedTavilySearch
 from src.utils.json_utils import repair_json_output
 
-from .types import State
 from ..config import SELECTED_SEARCH_ENGINE, SearchEngine
+from .types import State
 
 logger = logging.getLogger(__name__)
 
@@ -106,7 +105,7 @@ def planner_node(
     elif AGENT_LLM_MAP["planner"] == "basic":
         llm = get_llm_by_type("basic").with_structured_output(
             Plan,
-            method="json_mode",
+            # method="json_mode",
         )
     else:
         llm = get_llm_by_type(AGENT_LLM_MAP["planner"])

src/llms/llm.py

@@ -1,15 +1,14 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from pathlib import Path
-from typing import Any, Dict
 import os
-import httpx
+from pathlib import Path
+from typing import Any, Dict, get_args
 
+import httpx
 from langchain_core.language_models import BaseChatModel
-from langchain_openai import ChatOpenAI, AzureChatOpenAI
 from langchain_deepseek import ChatDeepSeek
-from typing import get_args
+from langchain_openai import AzureChatOpenAI, ChatOpenAI
 
 from src.config import load_yaml_config
 from src.config.agents import LLMType

src/prompt_enhancer/graph/enhancer_node.py

@@ -8,8 +8,8 @@ from langchain.schema import HumanMessage
 
 from src.config.agents import AGENT_LLM_MAP
 from src.llms.llm import get_llm_by_type
-from src.prompts.template import apply_prompt_template
 from src.prompt_enhancer.graph.state import PromptEnhancerState
+from src.prompts.template import apply_prompt_template
 
 logger = logging.getLogger(__name__)
 
@@ -21,7 +21,6 @@ def prompt_enhancer_node(state: PromptEnhancerState):
     model = get_llm_by_type(AGENT_LLM_MAP["prompt_enhancer"])
 
     try:
-
         # Create messages with context if provided
         context_info = ""
         if state.get("context"):

src/prompt_enhancer/graph/state.py

@@ -1,7 +1,8 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from typing import TypedDict, Optional
+from typing import Optional, TypedDict
+
 from src.config.report_style import ReportStyle
 
 

src/prompts/template.py

@@ -1,11 +1,13 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import os
 import dataclasses
+import os
 from datetime import datetime
+
 from jinja2 import Environment, FileSystemLoader, select_autoescape
 from langgraph.prebuilt.chat_agent_executor import AgentState
+
 from src.config.configuration import Configuration
 
 # Initialize Jinja2 environment

src/prose/graph/builder.py

@@ -3,6 +3,7 @@
 
 import asyncio
 import logging
+
 from langgraph.graph import END, START, StateGraph
 
 from src.prose.graph.prose_continue_node import prose_continue_node

src/prose/graph/prose_improve_node.py

@@ -7,8 +7,8 @@ from langchain.schema import HumanMessage, SystemMessage
 
 from src.config.agents import AGENT_LLM_MAP
 from src.llms.llm import get_llm_by_type
-from src.prose.graph.state import ProseState
 from src.prompts.template import get_prompt_template
+from src.prose.graph.state import ProseState
 
 logger = logging.getLogger(__name__)
 

src/rag/__init__.py

@@ -1,10 +1,10 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from .retriever import Retriever, Document, Resource, Chunk
-from .ragflow import RAGFlowProvider
-from .vikingdb_knowledge_base import VikingDBKnowledgeBaseProvider
 from .builder import build_retriever
+from .ragflow import RAGFlowProvider
+from .retriever import Chunk, Document, Resource, Retriever
+from .vikingdb_knowledge_base import VikingDBKnowledgeBaseProvider
 
 __all__ = [
     Retriever,

src/rag/builder.py

@@ -3,8 +3,8 @@
 
 from src.config.tools import SELECTED_RAG_PROVIDER, RAGProvider
 from src.rag.ragflow import RAGFlowProvider
-from src.rag.vikingdb_knowledge_base import VikingDBKnowledgeBaseProvider
 from src.rag.retriever import Retriever
+from src.rag.vikingdb_knowledge_base import VikingDBKnowledgeBaseProvider
 
 
 def build_retriever() -> Retriever | None:

src/rag/ragflow.py

@@ -2,11 +2,13 @@
 # SPDX-License-Identifier: MIT
 
 import os
-import requests
-from src.rag.retriever import Chunk, Document, Resource, Retriever
 from typing import List, Optional
 from urllib.parse import urlparse
 
+import requests
+
+from src.rag.retriever import Chunk, Document, Resource, Retriever
+
 
 class RAGFlowProvider(Retriever):
     """

src/rag/retriever.py

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 import abc
+
 from pydantic import BaseModel, Field
 
 

src/rag/vikingdb_knowledge_base.py

@@ -1,16 +1,18 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import os
-import requests
-import json
 import hashlib
 import hmac
+import json
+import os
 import urllib.parse
 from datetime import datetime
-from src.rag.retriever import Chunk, Document, Resource, Retriever
 from urllib.parse import urlparse
 
+import requests
+
+from src.rag.retriever import Chunk, Document, Resource, Retriever
+
 
 class VikingDBKnowledgeBaseProvider(Retriever):
     """

src/server/chat_request.py

@@ -5,8 +5,8 @@ from typing import List, Optional, Union
 
 from pydantic import BaseModel, Field
 
-from src.rag.retriever import Resource
 from src.config.report_style import ReportStyle
+from src.rag.retriever import Resource
 
 
 class ContentItem(BaseModel):

src/server/mcp_utils.py

@@ -7,8 +7,8 @@ from typing import Any, Dict, List, Optional
 
 from fastapi import HTTPException
 from mcp import ClientSession, StdioServerParameters
-from mcp.client.stdio import stdio_client
 from mcp.client.sse import sse_client
+from mcp.client.stdio import stdio_client
 from mcp.client.streamable_http import streamablehttp_client
 
 logger = logging.getLogger(__name__)

src/tools/crawl.py

@@ -5,10 +5,11 @@ import logging
 from typing import Annotated
 
 from langchain_core.tools import tool
-from .decorators import log_io
 
 from src.crawler import Crawler
 
+from .decorators import log_io
+
 logger = logging.getLogger(__name__)
 
 

src/tools/decorators.py

@@ -1,8 +1,8 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import logging
 import functools
+import logging
 from typing import Any, Callable, Type, TypeVar
 
 logger = logging.getLogger(__name__)

src/tools/python_repl.py

@@ -4,8 +4,10 @@
 import logging
 import os
 from typing import Annotated, Optional
+
 from langchain_core.tools import tool
 from langchain_experimental.utilities import PythonREPL
+
 from .decorators import log_io
 
 

src/tools/retriever.py

@@ -3,15 +3,16 @@
 
 import logging
 from typing import List, Optional, Type
-from langchain_core.tools import BaseTool
+
 from langchain_core.callbacks import (
     AsyncCallbackManagerForToolRun,
     CallbackManagerForToolRun,
 )
+from langchain_core.tools import BaseTool
 from pydantic import BaseModel, Field
 
 from src.config.tools import SELECTED_RAG_PROVIDER
-from src.rag import Document, Retriever, Resource, build_retriever
+from src.rag import Document, Resource, Retriever, build_retriever
 
 logger = logging.getLogger(__name__)
 
@@ -22,9 +23,7 @@ class RetrieverInput(BaseModel):
 
 class RetrieverTool(BaseTool):
     name: str = "local_search_tool"
-    description: str = (
-        "Useful for retrieving information from the file with `rag://` uri prefix, it should be higher priority than the web search or writing code. Input should be a search keywords."
-    )
+    description: str = "Useful for retrieving information from the file with `rag://` uri prefix, it should be higher priority than the web search or writing code. Input should be a search keywords."
     args_schema: Type[BaseModel] = RetrieverInput
 
     retriever: Retriever = Field(default_factory=Retriever)

src/tools/search.py

@@ -17,18 +17,16 @@ from langchain_community.utilities import (
     WikipediaAPIWrapper,
 )
 
-from src.config import SearchEngine, SELECTED_SEARCH_ENGINE
-from src.config import load_yaml_config
-from src.tools.tavily_search.tavily_search_results_with_images import (
-    TavilySearchResultsWithImages,
-)
-
+from src.config import SELECTED_SEARCH_ENGINE, SearchEngine, load_yaml_config
 from src.tools.decorators import create_logged_tool
+from src.tools.tavily_search.tavily_search_results_with_images import (
+    TavilySearchWithImages,
+)
 
 logger = logging.getLogger(__name__)
 
 # Create logged versions of the search tools
-LoggedTavilySearch = create_logged_tool(TavilySearchResultsWithImages)
+LoggedTavilySearch = create_logged_tool(TavilySearchWithImages)
 LoggedDuckDuckGoSearch = create_logged_tool(DuckDuckGoSearchResults)
 LoggedBraveSearch = create_logged_tool(BraveSearch)
 LoggedArxivSearch = create_logged_tool(ArxivQueryRun)

src/tools/tavily_search/__init__.py

@@ -1,4 +1,4 @@
 from .tavily_search_api_wrapper import EnhancedTavilySearchAPIWrapper
-from .tavily_search_results_with_images import TavilySearchResultsWithImages
+from .tavily_search_results_with_images import TavilySearchWithImages
 
-__all__ = ["EnhancedTavilySearchAPIWrapper", "TavilySearchResultsWithImages"]
+__all__ = ["EnhancedTavilySearchAPIWrapper", "TavilySearchWithImages"]

src/tools/tavily_search/tavily_search_api_wrapper.py

@@ -7,8 +7,8 @@ from typing import Dict, List, Optional
 
 import aiohttp
 import requests
-from langchain_community.utilities.tavily_search import TAVILY_API_URL
-from langchain_community.utilities.tavily_search import (
+from langchain_tavily._utilities import TAVILY_API_URL
+from langchain_tavily.tavily_search import (
     TavilySearchAPIWrapper as OriginalTavilySearchAPIWrapper,
 )
 

src/tools/tavily_search/tavily_search_results_with_images.py

@@ -1,15 +1,15 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import logging
 import json
+import logging
 from typing import Dict, List, Optional, Tuple, Union
 
 from langchain.callbacks.manager import (
     AsyncCallbackManagerForToolRun,
     CallbackManagerForToolRun,
 )
-from langchain_community.tools.tavily_search.tool import TavilySearchResults
+from langchain_tavily.tavily_search import TavilySearch
 from pydantic import Field
 
 from src.tools.tavily_search.tavily_search_api_wrapper import (
@@ -19,7 +19,7 @@ from src.tools.tavily_search.tavily_search_api_wrapper import (
 logger = logging.getLogger(__name__)
 
 
-class TavilySearchResultsWithImages(TavilySearchResults):  # type: ignore[override, override]
+class TavilySearchWithImages(TavilySearch):  # type: ignore[override, override]
     """Tool that queries the Tavily Search API and gets back json.
 
     Setup:
@@ -34,9 +34,9 @@ class TavilySearchResultsWithImages(TavilySearchResults):  # type: ignore[overri
 
         .. code-block:: python
 
-            from langchain_community.tools import TavilySearchResults
+            from langchain_tavily.tavily_search import TavilySearch
 
-            tool = TavilySearchResults(
+            tool = TavilySearch(
                 max_results=5,
                 include_answer=True,
                 include_raw_content=True,
@@ -102,7 +102,9 @@ class TavilySearchResultsWithImages(TavilySearchResults):  # type: ignore[overri
     Default is False.
     """
 
-    api_wrapper: EnhancedTavilySearchAPIWrapper = Field(default_factory=EnhancedTavilySearchAPIWrapper)  # type: ignore[arg-type]
+    api_wrapper: EnhancedTavilySearchAPIWrapper = Field(
+        default_factory=EnhancedTavilySearchAPIWrapper
+    )  # type: ignore[arg-type]
 
     def _run(
         self,

src/tools/tts.py

@@ -6,10 +6,11 @@ Text-to-Speech module using volcengine TTS API.
 """
 
 import json
-import uuid
 import logging
+import uuid
+from typing import Any, Dict, Optional
+
 import requests
-from typing import Optional, Dict, Any
 
 logger = logging.getLogger(__name__)
 

src/utils/json_utils.py

@@ -1,8 +1,8 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import logging
 import json
+import logging
 from typing import Any
 import json_repair
 

src/workflow.py

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 import logging
+
 from src.config.configuration import get_recursion_limit
 from src.graph import build_graph
 

tests/integration/test_nodes.py

@@ -1,21 +1,26 @@
-from collections import namedtuple
 import json
+from collections import namedtuple
+from unittest.mock import MagicMock, patch
+
 import pytest
-from unittest.mock import patch, MagicMock
-from src.graph.nodes import planner_node
-from src.graph.nodes import human_feedback_node
-from src.graph.nodes import coordinator_node
-from src.graph.nodes import reporter_node
-from src.graph.nodes import _execute_agent_step
-from src.graph.nodes import _setup_and_execute_agent_step
-from src.graph.nodes import researcher_node
+
+from src.graph.nodes import (
+    _execute_agent_step,
+    _setup_and_execute_agent_step,
+    coordinator_node,
+    human_feedback_node,
+    planner_node,
+    reporter_node,
+    researcher_node,
+)
 
 # 在这里 mock 掉 get_llm_by_type，避免 ValueError
 with patch("src.llms.llm.get_llm_by_type", return_value=MagicMock()):
-    from langgraph.types import Command
-    from src.graph.nodes import background_investigation_node
-    from src.config import SearchEngine
     from langchain_core.messages import HumanMessage
+    from langgraph.types import Command
+
+    from src.config import SearchEngine
+    from src.graph.nodes import background_investigation_node
 
 
 # Mock data

tests/integration/test_template.py

@@ -2,7 +2,8 @@
 # SPDX-License-Identifier: MIT
 
 import pytest
-from src.prompts.template import get_prompt_template, apply_prompt_template
+
+from src.prompts.template import apply_prompt_template, get_prompt_template
 
 
 def test_get_prompt_template_success():

tests/integration/test_tts.py

@@ -1,9 +1,9 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import json
-from unittest.mock import patch, MagicMock
 import base64
+import json
+from unittest.mock import MagicMock, patch
 
 from src.tools.tts import VolcengineTTS
 

tests/test_state.py

@@ -1,8 +1,8 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import sys
 import os
+import sys
 from typing import Annotated
 
 # Import MessagesState directly from langgraph rather than through our application

tests/unit/config/test_configuration.py

@@ -3,6 +3,7 @@
 
 import sys
 import types
+
 from src.config.configuration import Configuration
 
 # Patch sys.path so relative import works

tests/unit/config/test_loader.py

@@ -3,6 +3,7 @@
 
 import os
 import tempfile
+
 from src.config.loader import load_yaml_config, process_dict, replace_env_vars
 
 

tests/unit/graph/test_builder.py

@@ -1,10 +1,11 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import pytest
-from unittest.mock import MagicMock, patch
 import importlib
 import sys
+from unittest.mock import MagicMock, patch
+
+import pytest
 
 import src.graph.builder as builder_mod
 

tests/unit/llms/test_llm.py

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 import pytest
+
 from src.llms import llm
 
 

tests/unit/prompt_enhancer/graph/test_builder.py

@@ -1,8 +1,9 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import MagicMock, patch
+
 import pytest
-from unittest.mock import patch, MagicMock
 
 from src.prompt_enhancer.graph.builder import build_graph
 from src.prompt_enhancer.graph.state import PromptEnhancerState

tests/unit/prompt_enhancer/graph/test_enhancer_node.py

@@ -1,13 +1,14 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import MagicMock, patch
+
 import pytest
-from unittest.mock import patch, MagicMock
 from langchain.schema import HumanMessage, SystemMessage
 
+from src.config.report_style import ReportStyle
 from src.prompt_enhancer.graph.enhancer_node import prompt_enhancer_node
 from src.prompt_enhancer.graph.state import PromptEnhancerState
-from src.config.report_style import ReportStyle
 
 
 @pytest.fixture

tests/unit/prompt_enhancer/graph/test_state.py

@@ -1,8 +1,8 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-from src.prompt_enhancer.graph.state import PromptEnhancerState
 from src.config.report_style import ReportStyle
+from src.prompt_enhancer.graph.state import PromptEnhancerState
 
 
 def test_prompt_enhancer_state_creation():

tests/unit/rag/test_ragflow.py

@@ -1,8 +1,10 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import MagicMock, patch
+
 import pytest
-from unittest.mock import patch, MagicMock
+
 from src.rag.ragflow import RAGFlowProvider, parse_uri
 
 

tests/unit/rag/test_retriever.py

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 import pytest
+
 from src.rag.retriever import Chunk, Document, Resource, Retriever
 
 

tests/unit/rag/test_vikingdb_knowledge_base.py

@@ -1,13 +1,15 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
-import os
-import pytest
-import json
 import hashlib
 import hmac
-from unittest.mock import patch, MagicMock
+import json
+import os
 from datetime import datetime
+from unittest.mock import MagicMock, patch
+
+import pytest
+
 from src.rag.vikingdb_knowledge_base import VikingDBKnowledgeBaseProvider, parse_uri
 
 

tests/unit/server/test_app.py

@@ -3,15 +3,16 @@
 
 import base64
 import os
-from unittest.mock import MagicMock, patch, mock_open
+from unittest.mock import MagicMock, mock_open, patch
+
 import pytest
-from fastapi.testclient import TestClient
 from fastapi import HTTPException
-from src.server.app import app, _make_event, _astream_workflow_generator
-from src.config.report_style import ReportStyle
+from fastapi.testclient import TestClient
+from langchain_core.messages import AIMessageChunk, ToolMessage
 from langgraph.types import Command
-from langchain_core.messages import ToolMessage
-from langchain_core.messages import AIMessageChunk
+
+from src.config.report_style import ReportStyle
+from src.server.app import _astream_workflow_generator, _make_event, app
 
 
 @pytest.fixture
@@ -333,7 +334,6 @@ class TestMCPEndpoint:
     def test_mcp_server_metadata_without_enable_configuration(
         self, mock_load_tools, client
     ):
-
         request_data = {
             "transport": "stdio",
             "command": "test_command",
@@ -547,7 +547,6 @@ class TestAstreamWorkflowGenerator:
     @pytest.mark.asyncio
     @patch("src.server.app.graph")
     async def test_astream_workflow_generator_with_interrupt_feedback(self, mock_graph):
-
         # Mock the async stream
         async def mock_astream(*args, **kwargs):
             # Verify that Command is passed as input when interrupt_feedback is provided
@@ -620,7 +619,6 @@ class TestAstreamWorkflowGenerator:
     @pytest.mark.asyncio
     @patch("src.server.app.graph")
     async def test_astream_workflow_generator_tool_message(self, mock_graph):
-
         # Mock tool message
         mock_tool_message = ToolMessage(content="Tool result", tool_call_id="tool_123")
         mock_tool_message.id = "msg_456"
@@ -659,7 +657,6 @@ class TestAstreamWorkflowGenerator:
     async def test_astream_workflow_generator_ai_message_with_tool_calls(
         self, mock_graph
     ):
-
         # Mock AI message with tool calls
         mock_ai_message = AIMessageChunk(content="Making tool call")
         mock_ai_message.id = "msg_789"
@@ -701,7 +698,6 @@ class TestAstreamWorkflowGenerator:
     async def test_astream_workflow_generator_ai_message_with_tool_call_chunks(
         self, mock_graph
     ):
-
         # Mock AI message with only tool call chunks
         mock_ai_message = AIMessageChunk(content="Streaming tool call")
         mock_ai_message.id = "msg_101"
@@ -740,7 +736,6 @@ class TestAstreamWorkflowGenerator:
     @pytest.mark.asyncio
     @patch("src.server.app.graph")
     async def test_astream_workflow_generator_with_finish_reason(self, mock_graph):
-
         # Mock AI message with finish reason
         mock_ai_message = AIMessageChunk(content="Complete response")
         mock_ai_message.id = "msg_finish"
@@ -780,7 +775,6 @@ class TestAstreamWorkflowGenerator:
     @pytest.mark.asyncio
     @patch("src.server.app.graph")
     async def test_astream_workflow_generator_config_passed_correctly(self, mock_graph):
-
         mock_ai_message = AIMessageChunk(content="Test")
         mock_ai_message.id = "test_id"
         mock_ai_message.response_metadata = {}

tests/unit/server/test_chat_request.py

@@ -1,24 +1,25 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import AsyncMock, MagicMock, patch
+
 import pytest
+from fastapi import HTTPException
 from pydantic import ValidationError
+
+import src.server.mcp_utils as mcp_utils  # Assuming mcp_utils is the module to test
 from src.config.report_style import ReportStyle
 from src.rag.retriever import Resource
-from unittest.mock import AsyncMock, patch, MagicMock
-from fastapi import HTTPException
-
 from src.server.chat_request import (
-    ContentItem,
     ChatMessage,
     ChatRequest,
-    TTSRequest,
+    ContentItem,
+    EnhancePromptRequest,
     GeneratePodcastRequest,
     GeneratePPTRequest,
     GenerateProseRequest,
-    EnhancePromptRequest,
+    TTSRequest,
 )
-import src.server.mcp_utils as mcp_utils  # Assuming mcp_utils is the module to test
 
 
 def test_content_item_text_and_image():

tests/unit/server/test_mcp_request.py

@@ -3,6 +3,7 @@
 
 import pytest
 from pydantic import ValidationError
+
 from src.server.mcp_request import MCPServerMetadataRequest, MCPServerMetadataResponse
 
 

tests/unit/server/test_mcp_utils.py

@@ -1,8 +1,9 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import AsyncMock, MagicMock, patch
+
 import pytest
-from unittest.mock import AsyncMock, patch, MagicMock
 from fastapi import HTTPException
 
 import src.server.mcp_utils as mcp_utils

tests/unit/tools/test_crawl.py

@@ -1,9 +1,9 @@
 from unittest.mock import Mock, patch
+
 from src.tools.crawl import crawl_tool
 
 
 class TestCrawlTool:
-
     @patch("src.tools.crawl.Crawler")
     def test_crawl_tool_success(self, mock_crawler_class):
         # Arrange

tests/unit/tools/test_decorators.py

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: MIT
 
 from unittest.mock import Mock, call, patch
+
 from src.tools.decorators import create_logged_tool
 
 
@@ -13,7 +14,6 @@ class MockBaseTool:
 
 
 class TestLoggedToolMixin:
-
     def test_run_calls_log_operation(self):
         """Test that _run calls _log_operation with correct parameters."""
         # Create a logged tool instance

tests/unit/tools/test_python_repl.py

@@ -2,13 +2,14 @@
 # SPDX-License-Identifier: MIT
 
 import os
-import pytest
 from unittest.mock import patch
+
+import pytest
+
 from src.tools.python_repl import python_repl_tool
 
 
 class TestPythonReplTool:
-
     @patch.dict(os.environ, {"ENABLE_PYTHON_REPL": "true"})
     @patch("src.tools.python_repl.repl")
     @patch("src.tools.python_repl.logger")

tests/unit/tools/test_search.py

@@ -2,14 +2,15 @@
 # SPDX-License-Identifier: MIT
 
 import os
-import pytest
 from unittest.mock import patch
-from src.tools.search import get_web_search_tool
+
+import pytest
+
 from src.config import SearchEngine
+from src.tools.search import get_web_search_tool
 
 
 class TestGetWebSearchTool:
-
     @patch("src.tools.search.SELECTED_SEARCH_ENGINE", SearchEngine.TAVILY.value)
     def test_get_web_search_tool_tavily(self):
         tool = get_web_search_tool(max_search_results=5)

tests/unit/tools/test_tavily_search_api_wrapper.py

@@ -1,16 +1,17 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 import json
+from unittest.mock import AsyncMock, MagicMock, Mock, patch
+
 import pytest
-from unittest.mock import Mock, patch, AsyncMock, MagicMock
 import requests
+
 from src.tools.tavily_search.tavily_search_api_wrapper import (
     EnhancedTavilySearchAPIWrapper,
 )
 
 
 class TestEnhancedTavilySearchAPIWrapper:
-
     @pytest.fixture
     def wrapper(self):
         with patch(

tests/unit/tools/test_tavily_search_results_with_images.py

@@ -1,18 +1,19 @@
 # Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
 # SPDX-License-Identifier: MIT
 
+from unittest.mock import AsyncMock, Mock, patch
+
 import pytest
-from unittest.mock import Mock, AsyncMock
-from src.tools.tavily_search.tavily_search_results_with_images import (
-    TavilySearchResultsWithImages,
-)
+
 from src.tools.tavily_search.tavily_search_api_wrapper import (
     EnhancedTavilySearchAPIWrapper,
 )
+from src.tools.tavily_search.tavily_search_results_with_images import (
+    TavilySearchWithImages,
+)
 
 
-class TestTavilySearchResultsWithImages:
-
+class TestTavilySearchWithImages:
     @pytest.fixture
     def mock_api_wrapper(self):
         """Create a mock API wrapper."""
@@ -21,8 +22,8 @@ class TestTavilySearchResultsWithImages:
 
     @pytest.fixture
     def search_tool(self, mock_api_wrapper):
-        """Create a TavilySearchResultsWithImages instance with mocked dependencies."""
-        tool = TavilySearchResultsWithImages(
+        """Create a TavilySearchWithImages instance with mocked dependencies."""
+        tool = TavilySearchWithImages(
             max_results=5,
             include_answer=True,
             include_raw_content=True,
@@ -64,15 +65,13 @@ class TestTavilySearchResultsWithImages:
 
     def test_init_default_values(self):
         """Test initialization with default values."""
-        tool = TavilySearchResultsWithImages()
+        tool = TavilySearchWithImages()
         assert tool.include_image_descriptions is False
         assert isinstance(tool.api_wrapper, EnhancedTavilySearchAPIWrapper)
 
     def test_init_custom_values(self):
         """Test initialization with custom values."""
-        tool = TavilySearchResultsWithImages(
-            max_results=10, include_image_descriptions=True
-        )
+        tool = TavilySearchWithImages(max_results=10, include_image_descriptions=True)
         assert tool.max_results == 10
         assert tool.include_image_descriptions is True
 

tests/unit/tools/test_tools_retriever.py

@@ -2,13 +2,15 @@
 # SPDX-License-Identifier: MIT
 
 from unittest.mock import Mock, patch
-from langchain_core.callbacks import (
-    CallbackManagerForToolRun,
-    AsyncCallbackManagerForToolRun,
-)
+
 import pytest
+from langchain_core.callbacks import (
+    AsyncCallbackManagerForToolRun,
+    CallbackManagerForToolRun,
+)
+
+from src.rag import Chunk, Document, Resource, Retriever
 from src.tools.retriever import RetrieverInput, RetrieverTool, get_retriever_tool
-from src.rag import Document, Retriever, Resource, Chunk
 
 
 def test_retriever_input_model():

tests/unit/utils/test_json_utils.py

@@ -2,11 +2,11 @@
 # SPDX-License-Identifier: MIT
 
 import json
+
 from src.utils.json_utils import repair_json_output
 
 
 class TestRepairJsonOutput:
-
     def test_valid_json_object(self):
         """Test with valid JSON object"""
         content = '{"key": "value", "number": 123}'

uv.lock

@@ -18,7 +18,7 @@ wheels = [
 
 [[package]]
 name = "aiohttp"
-version = "3.11.13"
+version = "3.12.14"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "aiohappyeyeballs" },
@@ -29,52 +29,55 @@ dependencies = [
     { name = "propcache" },
     { name = "yarl" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/e6/0b/e39ad954107ebf213a2325038a3e7a506be3d98e1435e1f82086eec4cde2/aiohttp-3.12.14.tar.gz", hash = "sha256:6e06e120e34d93100de448fd941522e11dafa78ef1a893c179901b7d66aa29f2", size = 7822921, upload-time = "2025-07-10T13:05:33.968Z" }
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@@ -382,6 +361,7 @@ dependencies = [
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     { name = "langchain-mcp-adapters" },
     { name = "langchain-openai" },
+    { name = "langchain-tavily" },
     { name = "langgraph" },
     { name = "langgraph-checkpoint-mongodb" },
     { name = "langgraph-checkpoint-postgres" },
@@ -401,7 +381,6 @@ dependencies = [
 
 [package.optional-dependencies]
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@@ -414,7 +393,6 @@ test = [
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     { name = "langchain-openai", specifier = ">=0.3.8" },
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